Why auto-transmission cars return less mileage?

. This is a discussion on Why auto-transmission cars return less mileage? within The Technical Zone. Part of The Automotive Answers category; hey people can you explain why auto transmission cars give less mileage??...

A manual transmission is inherently better equipped to prove better fuel economy. The manual transmission couples the engine to the transmission with a rigid clutch instead of an automatic transmission's torque converter, which bleeds off power. The automatic transmission wastes engine power to drive the high pressure hydraulic pumps required for its operation.

Cvt- Almost like the variators used in scoterrets, sunny, activa and the lyks.
Came later in cars, due to engineering constraints. It Primarily uses a belt sliding on cone shaped pulleys. The torque rating of cars being higher, the belt construction was dificult.Proggamble for paddle shifting. Used in city,Civic.